JP6101065B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner mounted on, for example, an automobile.

  Conventionally, as a vehicle air conditioner, a cooling heat exchanger and a heating heat exchanger are accommodated in a casing, and after the temperature of the air conditioning air introduced into the casing is adjusted, What was comprised so that it might supply to each part is known.

  In Patent Literature 1, a defroster port, a vent port, and a foot port are formed in a casing. Inside the casing, an air mix space for mixing cold air and hot air, and an upper side communicating with the defroster port and the vent port A passage and a lower passage communicating with the foot port are formed. Further, a rotary damper for opening and closing the upper passage and the lower passage is provided inside the casing, and the blower mode is switched by rotating the rotary damper. The rotary damper has a closing wall portion that extends in the rotation axis direction to open and close the passage, a pair of end wall portions that extend from both ends in the rotation axis direction of the closing wall portion, and a diameter of the rotation shaft from the closing wall portion. And a plate-like part provided apart in the circumferential direction.

  When the plate-like portion is in a blowing mode in which conditioned air flows to the upper and lower passages by the rotary damper, from the downstream end of the hot air passage where the heat exchanger for heating is arranged to the cold air introduction side of the air mix space It arrange | positions so that it may extend toward. Thereby, the warm air which flowed into the air mix space from the warm air passage is guided to the cold air introduction side by the plate-like portion to improve the air mix property.

  On the other hand, the plate-like portion is disposed so as to extend toward the upper passage when the rotary damper is in the blowing mode in which conditioned air flows to the upper passage. Thereby, the conditioned air in the air mix space can be smoothly guided to the upper passage.

Japanese Patent No. 4346388

  By the way, in recent years, further downsizing of the vehicle air conditioner has been demanded. However, in the vehicle air conditioner disclosed in Patent Document 1, the plate-like portion of the rotary damper extends from the closed wall portion to the radial direction and the circumference of the rotating shaft. Since they are provided away from each other in the direction, the closing wall portion and the plate-like portion are arranged at symmetrical positions with the rotation shaft interposed therebetween, and the rotary damper becomes large.

  Further, if the vehicle air conditioner is made compact, it is difficult to secure a sufficient air mix space, and there is a concern that the air mix performance is deteriorated. Furthermore, setting of the air flow path in the casing becomes difficult, and there is a concern that the amount of blown air is reduced.

  This invention is made | formed in view of this point, The place made into the objective guides air in an air mix space, without reducing air mix property and reducing the amount of blowing air. The rotary damper having the plate-like portion for reducing the size of the air-conditioning apparatus is thus made compact.

  In order to achieve the above object, in the present invention, the rotary damper having a plate-like portion for guidance can be reduced in size by devising the position where the plate-like portion of the rotary damper is formed.

The first invention is
A heat exchanger for cooling;
A heat exchanger for heating;
While containing the cooling heat exchanger and the heating heat exchanger, and comprising a casing formed with a defroster port, a vent port and a foot port,
Inside the casing, a cool air passage in which the cooling heat exchanger is disposed, a hot air passage in which the heating heat exchanger is disposed and the downstream side extends upward, the cold air passage, and the hot air passage An air mix space that introduces and mixes air blown from the air to generate conditioned air, a first passage that communicates with the air mix space and is connected to at least one of the defroster port and the vent port, and the air mix space communicating with the side closer to the warm air passage than communicating portion of said first passage extending downwardly in, defining a second passage connected to the foot opening, and the hot air passage and the second passage In this manner, a partition wall extending in the vertical direction and a holding portion for holding the heat exchanger for heating are provided in the vicinity of the downstream end of the hot air passage, and the upstream ends of the first passage and the second passage are aligned. Positioned on It is,
Between the upper end portion of the partition wall and the holding portion, the downstream end of the hot air passage is positioned,
The air mix space has a rotation shaft that rotates in the direction in which the upstream ends of the first passage and the second passage are aligned, and a closing wall portion that opens and closes the first passage and the second passage, A rotary damper that changes the amount of conditioned air flowing from the air mix space to the first passage and the second passage by the closing wall and switches the blowing mode is provided;
The rotary damper extends from the vicinity of the downstream end of the hot air passage toward the cold air introduction side of the air mix space when in a blowing mode in which conditioned air flows to the first passage and the second passage. Hot air that has flowed into the air mix space from the hot air passage is guided to the cold air introduction side of the air mix space, and on the other hand, when the blow mode is selected so that conditioned air flows into the first passage, the air flows toward the first passage. And a plate-like portion for guiding the conditioned air in the air mix space to the first passage is provided,
The plate-like portion is disposed between the rotary shaft and the closing wall portion when the rotary damper is viewed from the direction of the rotary shaft, and conditioned air is supplied to the first passage and the second passage. An extension passage that extends from the vicinity of the upper end portion of the partition wall toward the cold air introduction side and extends the hot air passage to the air mix space by the plate-like portion and the holding portion when the blowing mode is selected. On the other hand, the warm air flowing out from the downstream end opening of the warm air passage is made between the plate-like portion and the upper end portion of the partition wall when the blowout mode in which conditioned air flows to the first passage is set. It is formed so that it may flow through .

  According to this configuration, the air-conditioning air introduced into the casing becomes cold air in the cold air passage, and becomes hot air in the hot air passage. These cold air and warm air flow into the air mix space and are mixed to become conditioned air.

  When cold air and hot air are mixed in the air mix space, the conditioned air is introduced into the first and second passages and blown out from the defroster port and the foot port, or blown out mode from the vent port and the foot port. Since the warm air from the warm air passage is guided to the cold air introduction side of the air mix space by the plate-like portion, the warm air and the cool air are sufficiently mixed in the air mix space. Then, the conditioned air in the air mix space flows into the first and second passages. At this time, the second passage communicates with the side of the air mix space close to the hot air passage, so that the conditioned air flows into the second passage. The temperature of the air is higher than the temperature of the conditioned air flowing into the first passage. As a result, conditioned air having a relatively high temperature blows out from the foot opening, so that the occupant does not feel cold at the feet. In addition, the temperature difference between the conditioned air flowing into the first and second passages is within an appropriate range because the cold air and the hot air are sufficiently mixed as described above. The temperature difference between the conditioned air blown out from the mouth and the temperature difference between the conditioned air blown out from the vent opening and the foot opening do not become too large.

  On the other hand, when it is in the blowing mode in which conditioned air is blown out from the defroster port or the vent port, the conditioned air in the air mix space is guided to the first passage by the plate-like portion, and the conditioned air smoothly flows into the first passage. Therefore, it becomes possible to ensure a sufficient amount of blown air.

  Since the plate-like portion is disposed between the rotary shaft of the rotary damper and the closing wall portion, the closing wall portion and the plate-like portion are arranged at symmetrical positions with the rotation shaft interposed therebetween as in the conventional example. It is possible to reduce the size of the rotary damper as compared with the case where it is used.

  In addition, since the plate-like portion is disposed between the rotating shaft and the closing wall portion, the hot air guided by the plate-like portion passes between the rotating shaft of the rotary damper and the closing wall portion, At this time, mixing with the cold air in the air mix space is promoted, so that the air mix property is improved.

According to a second invention, in the first invention,
At least a part of the plate-like portion is accommodated in the hot air passage when the rotary damper is in a rotational position for opening the first passage.

  According to this configuration, since at least a part of the plate-like portion is accommodated in the hot air passage when the rotary damper is in the rotational position where the first passage is opened, the plate-like portion is moved to the first passage. It becomes difficult to inhibit the flow, and it becomes possible to secure a sufficient amount of blown air.

According to a third invention, in the first invention,
Upper Symbol plate portion is to the rotary damper when in the rotated position opening the second passage, characterized in that positioned to squeeze the downstream side of the upper Kinobe length passages.

  According to this configuration, when the rotary damper is in the rotational position for opening the second passage, the hot air blown out from the hot air passage passes through the extension passage. Since the downstream side of the extension passage is narrowed, it is possible to increase the airflow by increasing the flow velocity of the hot air and causing it to collide with the cold air vigorously.

  According to the first aspect of the invention, when the blow mode in which conditioned air flows to the first passage and the second passage is set, the first air passage extends from the vicinity of the downstream end of the hot air passage toward the cold air introduction side of the air mix space. Since the rotary damper is provided with a plate-like portion extending toward the first passage when the conditioned air flows into the passage, the plate-like portion is disposed between the rotary shaft of the rotary damper and the closing wall portion. The rotary damper can be reduced in size without deteriorating the air mix and without reducing the amount of blown air, thereby making it possible to make a high-performance vehicle air conditioner compact.

  According to the second invention, since at least a part of the plate-like portion is accommodated in the hot air passage when the rotary damper is in the rotational position for opening the first passage, the blowout from the defroster port or the vent port A sufficient amount of air can be secured, and passenger comfort can be improved.

  According to the third aspect of the invention, when the rotary damper is in the rotational position for opening the second passage, the extension passage extending the warm air passage is formed and the downstream side of the extension passage is throttled. It is possible to increase the airflow by increasing the flow velocity of the wind and causing it to collide with the cold wind, thereby improving the comfort of the passenger.

It is a longitudinal cross-sectional view of the vehicle air conditioner which concerns on embodiment of this invention, and shows the time of differential / foot modes. FIG. 2 is a view corresponding to FIG. 1 in a vent mode. It is a perspective view of a heat damper. It is a left view of a heat damper.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use. In the description of the embodiment, for convenience of explanation, “front” means the front side of the vehicle, “rear” means the rear side of the vehicle, and “left” means the left side of the vehicle. Furthermore, “right” represents the right side of the vehicle.

  FIG. 1 is a longitudinal sectional view of a vehicle air conditioner 1 according to an embodiment of the present invention, and shows a case where the blowing mode is a differential / foot mode (described later). The vehicle air conditioner 1 can be mounted on, for example, a vehicle such as an automobile. In this embodiment, the vehicle air conditioner 1 is installed inside an instrument panel (not shown) disposed in the front part of the passenger compartment of the automobile. It is to be accommodated.

  The vehicle air conditioner 1 includes an evaporator 10 as a heat exchanger for cooling, a heater core 11 as a heat exchanger for heating, an air mix damper 12, a heat damper 13, a defroster damper 14, and a casing 15 for housing them. And. The casing 15 is formed by molding a resin material, for example, and is divided in the left-right direction in the vicinity of the center in the left-right direction. An evaporator housing portion 20 is provided on the front side of the casing 15. An air inlet 21 is formed in the front portion of the side wall of the evaporator accommodating portion 20. A blower unit (not shown) is connected to the air inlet 21. The blower unit includes a blower fan and a fan drive motor, and is configured to be able to select and blow one of the air inside the vehicle interior and the air outside the vehicle compartment.

  A defroster port 22 and a vent port 23 are formed on the rear side of the upper wall portion of the casing 15. The defroster port 22 is located on the front side of the vent port 23. Further, a foot opening 24 is formed in the rear portion of the casing 15.

  The defroster port 22 is connected to a defroster outlet of the instrument panel via a defroster duct (not shown), and is mainly for supplying conditioned air to the inner surface of the front window. The vent port 23 is connected to a vent outlet of the instrument panel via a vent duct (not shown), and is mainly for supplying conditioned air to the upper body of the occupant. The vent outlets are respectively provided on the left and right sides and the center of the instrument panel. The foot opening 24 is for supplying conditioned air to the passenger's feet via a foot duct (not shown). The foot duct may extend not only to the front seat but also to the rear seat.

  An air passage R extending from the air introduction port 21 to the defroster port 22, the vent port 23 and the foot port 24 is formed in the casing 15. That is, the air passage R includes a cold air passage R1 connected to the air inlet 21, a hot air passage R2 that branches from the downstream end of the cold air passage R1, and extends downward, and an upper side of the downstream end of the cold air passage R1 and hot air An air mix space R3 that communicates with the downstream end of the passage R2, an upper passage (first passage) R4 that communicates with the air mix space R3 and extends upward, and a lower passage that communicates with the air mix space R3 and extends downward ( 2nd passage) R5.

  The cold air passage R <b> 1 extends rearward in the evaporator accommodating portion 20, and the evaporator 10 is disposed in the middle of the evaporator air passage 20. The evaporator 10 generates cold air. The evaporator 10 constitutes a refrigerant evaporator of a refrigeration cycle apparatus, and is a tube-and-fin type heat exchanger having a plurality of tubes and fins. The evaporator 10 is disposed such that the tube extends in the vertical direction and crosses the cold air passage R1. Almost all of the air-conditioning air introduced into the casing 15 passes through the evaporator 10.

  The cool air passage R1 generates cool air when the compressor of the refrigeration cycle apparatus is operating, and does not generate cool air when the compressor is stopped. It will be called a cold air passage R1.

  The warm air passage R2 is formed in the lower half portion inside the casing 15. The upstream end of the warm air passage R <b> 2 is located in the middle portion of the casing 15 in the vertical direction. The hot air passage R2 extends obliquely rearward toward the lower side of the casing 15, and then extends obliquely forward to the upper side so that the downstream side makes a U-turn. And the heater core 11 is arrange | positioned in the middle part of warm air path R2. The warm air passage R <b> 2 is a passage that generates warm air by the heater core 11. The heater core 11 is a tube-and-fin type heat exchanger through which cooling water of an automobile engine circulates. The heater core 11 is disposed so as to cross the hot air passage R <b> 2, and substantially the entire amount of air flowing through the hot air passage R <b> 2 passes through the heater core 11. The heater core 11 is inclined so that the upper part is located on the rear side of the lower part. A heating heat exchanger other than the heater core 11 can also be used.

  A lower holding portion 26 that holds the lower portion of the heater core 11 is provided on the front side of the lower wall portion of the casing 15. Further, an upper holding portion 27 that holds the upper portion of the heater core 11 is provided in the vicinity of the central portion in the vertical direction inside the casing 15. A partition wall 28 for partitioning the warm air passage R2 and the lower passage R5 is provided behind the upper holding portion 27 in the casing 15. The partition wall 28 extends upward from the rear side of the lower wall portion of the casing 15, and forms a downstream portion of the warm air passage R <b> 2 from the heater core 11. The substantially lower half of the partition wall 28 is inclined so as to be located later as it goes upward, while the substantially upper half is inclined so as to be located forward as it goes upward. By forming the partition wall 28 in this way, the warm air after passing through the heater core 11 in the warm air passage R2 flows upward and obliquely forward.

  The downstream end opening 29 of the hot air passage R <b> 2 is located between the upper end portion of the partition wall 28 and the upper holding portion 27. The cross-sectional area of the downstream end opening 29 of the hot air passage R2 is narrower than the cross-sectional area of the portion where the heater core 11 is disposed, thereby restricting the downstream side of the hot air passage R2 to reduce the flow velocity of the hot air. It is increasing.

  The air mix space R3 is located in the casing 15 above the warm air passage R2 (above the upper holding portion 27), and is a space for mixing warm air and cold air to generate conditioned air. An extension plate 30 is provided on the upper wall portion of the casing 15 so as to extend downward toward the connection portion with the air mix space R3 at the downstream end of the cool air passage R1. A rear side of the base end portion of the extension plate 30 is an air mix space R3. The upper side of the partition wall 28 and the upper side of the upper holding part 27 is an air mix space R3.

  The upstream end opening 31 of the upper passage R4 communicates with the upper portion of the air mix space R3. The upper passage R4 extends upward, and the downstream side of the upper passage R4 branches in the front-rear direction. A defroster port 22 is formed on the front side downstream of the upper passage R4, and a vent port 23 is formed on the rear side.

  The upstream end opening 32 of the lower passage R5 communicates with the rear portion of the air mix space R3 and is located on the rear side of the upstream end opening 31 of the upper passage R4. That is, the upstream end opening 31 of the upper passage R4 and the upstream end opening 32 of the lower passage R5 are aligned in the front-rear direction. The lower passage R5 extends downward, and a foot port 24 is formed at the downstream end.

  The air mix damper 12 is for adjusting the temperature of the conditioned air by changing the amount of cold air and the amount of hot air flowing into the air mix space R3. The air mix damper 12 has a turning shaft 12a extending in the left-right direction and a turning shaft 12a. And a closing plate portion 12b extending in the radial direction. Reference numeral 12d is a sealing material made of urethane foam or the like. The rotation shaft 12 a is supported so as to be rotatable around a center line extending in the left-right direction with respect to the side wall portion of the casing 15. An actuator (not shown) disposed outside the casing 15 is connected to the rotation shaft 12a. The actuator is controlled by an air conditioning control device (not shown), and the rotation angle of the air mix damper 12 is set in accordance with the set temperature of the occupant, the outside air temperature, the inside air temperature, the amount of solar radiation, etc., and the actuator is operated so as to be the angle. It is configured to let you.

  Note that an operation wire may be connected to the rotation shaft 12a of the air mix damper 12 via a link, and the air mix damper 12 may be rotated by an occupant lever operation or dial operation.

  The rotation shaft 12 a of the air mix damper 12 is located in the vicinity of the front portion of the upper holding portion 27. The closing plate portion 12b swings in the vertical direction by the rotation of the rotation shaft 12a. A protruding plate 12c is provided on the distal end side of the closing plate portion 12b. When the closing plate portion 12b swings upward, the closing plate portion 12b closes the upper portion of the downstream end of the cool air passage R1, and opens the upstream end of the hot air passage R2. When the closing plate portion 12b closes the upper portion of the downstream end of the cold air passage R1, the cold air does not flow into the air mix space R3 from the cold air passage R1, and the cold air in the cold air passage R1 flows into the hot air passage R2 and is heated. Since it flows into air mix space R3, heating can be performed. On the other hand, when the closing plate portion 12b swings downward, it closes the upstream end of the hot air passage R2 and opens the upper portion of the downstream end of the cold air passage R1. When the closing plate portion 12b closes the upstream end of the hot air passage R2, the cold air does not flow into the hot air passage R2 from the cold air passage R1, and the cold air in the cold air passage R1 flows into the air mix space R3. It can be performed. That is, the amount of cool air and the amount of warm air flowing into the air mix space R3 are changed according to the rotation angle of the air mix damper 12.

  In a state where the air mix damper 12 is rotated upward, the extending plate 30 of the casing 15 and the protruding plate 12c of the air mix damper 12 are positioned so as to overlap in the plate thickness direction. As a result, when the air mix damper 12 is slightly rotated downward from a position where the air mix damper 12 is at the upper limit of rotation, the cold air in the cool air passage R1 is prevented from flowing into the air mix space R3 all at once, thereby controlling the temperature. Can be improved.

  As shown in FIGS. 3 and 4, the heat damper 13 is a rotary damper, and includes a left rotation shaft 13a, a right rotation shaft 13b, a left end wall portion 13c, a right end wall portion 13d, and a closing wall portion. 13e and a plate-like portion 13f for guiding air. Reference numeral 13g denotes a sealing material similar to the sealing material of the air mix damper 12.

  The left rotation shaft 13a and the right rotation shaft 13b extend in the left-right direction, are located concentrically, and are rotatably supported by the side wall portion of the casing 15. The rotary damper 13 is rotated by the left rotation shaft 13a and the right rotation shaft 13b in the front-rear direction, that is, the direction in which the upstream end opening 31 of the upper passage R4 and the upstream end opening 32 of the lower passage R5 are aligned. It has become.

  The left end wall portion 13c is substantially triangular in a side view. A base end portion (right end portion) of the left rotation shaft 13a is fixed near one vertex of the left end wall portion 13c, and the left rotation shaft 13a protrudes from the left end wall portion 13c to the left side.

  The right end wall portion 13d is also substantially triangular in a side view like the left end wall portion 13c, and the base end portion (left end portion) of the right rotation shaft 13b is fixed near one vertex of the right end wall portion 13d. The right rotation shaft 13b protrudes rightward from the right end wall 13d.

  The closing wall portion 13e is a rectangular shape extending in the left-right direction so as to connect one side of the left end wall portion 13c away from the left rotation shaft 13a and one side of the right end wall portion 13d away from the right rotation shaft 13b. Is formed. The closing wall 13e is configured such that one of the upstream end opening 31 of the upper passage R4 and the upstream end opening 32 of the lower passage R5 is closed and the other is opened, or both are opened. Can be done. The closing wall portion 13e has a flat plate shape.

  As shown in FIG. 2, when the upstream end opening 31 of the upper passage R4 is opened and the upstream end opening 32 of the lower passage R5 is closed, the blowing mode in which mainly conditioned air flows to the upper passage R4 is set. In this blowing mode, the conditioned air may be slightly leaked to the lower passage R5, or the entire amount may be allowed to flow to the upper passage R4.

  On the other hand, although not shown, when the upstream end opening 31 of the upper passage R4 is closed and the upstream end opening 32 of the lower passage R5 is opened, the blow mode in which conditioned air flows to the lower passage R5 is set. Further, as shown in FIG. 1, when both the upstream end opening 31 of the upper passage R4 and the upstream end opening 32 of the lower passage R5 are opened, a blow-out mode in which conditioned air flows to the upper passage R4 and the lower passage R5 is set. .

  As shown in FIGS. 3 and 4, extended plates 13 h and 13 h are formed on both edge portions of the closing wall portion 13 e that extend in the left-right direction.

  The plate-like portion 13f is disposed between the left rotation shaft 13a and the right rotation shaft 13b and the closing wall portion 13e when viewed in the rotation axis direction of the heat damper 13 (side view). That is, the plate-like portion 13f is located between the right rotation shaft 13b of the right end wall portion 13d and the closing wall portion 13e from the portion between the left rotation shaft 13a and the closing wall portion 13e of the left end wall portion 13c. It extends over the part.

  Thus, since the plate-like portion 13f is disposed between the rotation shafts 13a and 13b of the heat damper 13 and the closing wall portion 13e in a side view, the closing wall portion and the plate-like portion are arranged as in the conventional example. The heat damper 13 can be reduced in size as compared with the case where is disposed at a symmetrical position with the rotation axis interposed therebetween.

  Further, in the side view, the interval between the plate-like portion 13f and the closing wall portion 13e is set wider than the interval between the plate-like portion 13f, the left rotation shaft 13a and the right rotation shaft 13b.

  The rear edge portion of the plate-like portion 13f protrudes rearward from the rear edge portions of the left end wall portion 13c and the right end wall portion 13d. The front edge portion of the plate-like portion 13f is located on the rear side of the front edge portions of the left end wall portion 13c and the right end wall portion 13d. Further, the plate-like portion 13f is gently curved so that the intermediate portion in the front-rear direction is closest to the closed wall portion 13e as a whole.

  The plate-like portion 13f is arranged as follows. When the heat damper 13 is in the blowing mode in which conditioned air flows to the upper passage R4 and the lower passage R5 shown in FIG. 1, the plate-like portion 13f introduces cold air into the air mix space R3 from the vicinity of the downstream end of the hot air passage R2. It extends toward the side (front side). At this time, the rear edge portion of the plate-like portion 13f is located in the vicinity of the upper end portion of the partition wall 28, and the partition wall 28 and the plate-like portion 13f are substantially continuous to form one plate shape. The plate-like portion 13f is entirely located in the air mix space R3. In this state, the plate-like portion 13f guides the warm air flowing into the air mix space R3 from the warm air passage R2 to the cold air introduction side of the air mix space R3.

  In the blowing mode in which conditioned air flows to the upper passage R4 and the lower passage R5, the upper holding portion 27 and the plate-like portion 13f are positioned so as to face each other with a predetermined gap therebetween. An extension passage R6 extending so as to extend the warm air passage R2 is formed between the upper holding portion 27 and the plate-like portion 13f. The cross-sectional area on the downstream side of the extension passage R6 is narrower than the cross-sectional area on the upstream side. That is, the plate-like portion 13f is positioned so as to restrict the downstream side of the extension passage R6.

  On the other hand, when the heat damper 13 is in the blowing mode in which conditioned air flows to the upper passage R4 shown in FIG. 2, the plate-like portion 13f extends toward the upper passage R4. At this time, the rear portion of the plate-like portion 13f is in a state of being accommodated in the lower part of the downstream end opening 29 of the hot air passage R2, that is, in the hot air passage R2. Further, the rear portion of the plate-like portion 13f is in a state of approaching the upper holding portion 27, and the warm air flows between the plate-like portion 13f and the partition wall 28 and flows into the air mix space R3. The front part of the plate-like part 13f is located in the air mix space R3.

  Further, when the heat damper 13 rotates until the upper passage R4 is closed, the lower passage R5 is fully opened. At this time, since the plate-like portion 13f is separated from the upper end portion of the partition wall 28, an air passage is formed between the plate-like portion 13f and the upper end portion of the partition wall 28.

  The defroster damper 14 is for switching the blowing mode by closing one of the defroster port 22 and the vent port 23 and opening the other, and in the radial direction of the rotation shaft 14a extending in the left-right direction and the rotation shaft 14a. And a stop plate portion 14b extending. Reference numeral 14c is a sealing material made of foamed urethane or the like. The rotation shaft 14 a is supported so as to be rotatable around a center line extending in the left-right direction with respect to the side wall portion of the casing 15. A link mechanism disposed outside the casing 15 is connected to the rotation shaft 14a. The link mechanism is also connected to the rotating shaft 13a of the heat damper 13, so that the heat damper 13 and the defroster damper 14 can be linked via the link mechanism. The heat damper 13 and the defroster damper 14 may be operated by an actuator, or may be operated by an occupant operating an operation wire.

  The rotation shaft 14 a of the defroster damper 14 is located between the defroster port 22 and the vent port 23 on the upper wall portion of the casing 15. The closing plate portion 14b swings in the front-rear direction by the rotation of the rotation shaft 14a. When the closing plate portion 14b swings forward, it closes the defroster port 22 and opens the vent port 23. On the other hand, when the closing plate portion 14b swings backward, the vent port 23 is closed and the defroster port 22 is opened.

  The movement of the heat damper 13 and the defroster damper 14 can be set according to the shape of the cam of a known link mechanism. In this embodiment, the heat damper 13 closes the lower passage R5, the defroster damper 14 closes the defroster port 22 (shown in FIG. 2), the heat damper 13 opens the upper passage R4 and the lower passage R5, and the defroster damper 14 Is a differential / foot mode in which the vent port 23 is closed (shown in FIG. 1), the heat damper 13 opens the upper passage R4 and the lower passage R5, the defroster damper 14 closes the defroster port 22, and the heat damper 13 is the lower passage. It is possible to switch to a blowing mode such as a defroster mode in which R5 is closed and the defroster damper 14 closes the vent port 23, and a foot mode in which the heat damper 13 closes the upper passage R4.

  Next, operation | movement of the vehicle air conditioner 1 comprised as mentioned above is demonstrated. The air blown from the blower unit flows into the cool air passage R1 from the air inlet 21 of the casing 15, flows to the rear side, passes through the evaporator 10, and is cooled. The amount of air flowing from the cold air passage R1 into the hot air passage R2 is set according to the rotation angle of the air mix damper 12, and the air flowing into the hot air passage R2 passes through the heater core 11 and is heated.

  At this time, when the upper passage R4 and the lower passage R5 are open as in the differential / foot mode shown in FIG. 1, the plate-like portion 13f of the heat damper 13 is substantially the same as the upper end portion of the partition wall 28. Since it is continuous, the warm air from the warm air passage R2 is guided to the cold air introduction side of the air mix space R3 by the plate-like portion 13f. Thereby, warm air and cold air are fully mixed in air mix space R3.

  The conditioned air in the air mix space R3 flows into the upper passage R4 and the lower passage R5 through the rear side of the closed wall portion 13e of the heat damper 13, and the upstream end opening 32 of the lower passage R5 is in the air mix space R3. Therefore, the temperature of the conditioned air flowing into the lower passage R5 is higher than the temperature of the conditioned air flowing into the upper passage R4. Therefore, since conditioned air having a relatively high temperature blows out from the foot opening 24, the occupant does not feel cold at the feet. In addition, the temperature difference between the conditioned air flowing into the upper passage R4 and the lower passage R5 is within an appropriate temperature range because the cold air and the hot air are sufficiently mixed as described above. The temperature difference between the conditioned air blown out from the mouth 22 and the foot mouth 24 does not become too large. Similar effects can be obtained when conditioned air is blown from the vent port 23 and the foot port 24 in the bi-level mode.

  Moreover, the warm air blown out from the warm air passage R2 passes through the extension passage R6 between the plate-like portion 13f of the heat damper 13 and the partition wall 28. Since the downstream side of the extension passage R6 is throttled, it is possible to increase the flow velocity of the hot air in the air mix space R3 and to make it collide with the cold air in the air mix space R3 with vigor. Thereby, it becomes possible to improve air mix property further.

  On the other hand, when the defroster mode or the vent mode is set, the plate-like portion 13f of the heat damper 13 extends toward the upper passage R4 as shown in FIG. 2, so that the conditioned air in the air mix space R3 is transferred to the plate-like portion 13f. Is guided to the upper passage R4. As a result, the conditioned air smoothly flows into the upper passage R4, so that a sufficient amount of blown air can be secured.

  In addition, since the plate-like portion 13f is disposed between the rotating shafts 13a and 13b and the closing wall portion 13e, the warm air guided by the plate-like portion 13f is rotated by the rotating shafts 13a and 13b of the heat damper 13 and the closing wall portion. 13e, and mixing with the cold air in the air mix space R3 is promoted at this time, so that the air mix performance is improved.

  Since the rear part of the plate-like portion 13f is accommodated in the hot air passage R2 when the heat damper 13 is in the pivot position for opening the upper passage R4, the plate-like portion 13f hardly obstructs the air flow toward the upper passage R4. Thus, it is possible to ensure a sufficient amount of blown air.

  As described above, according to this embodiment, when the blow mode is set in which conditioned air flows to the upper passage R4 and the lower passage R5, cold air introduction into the air mix space R3 is performed from the vicinity of the downstream end of the hot air passage R2. A plate-like portion 13f extending toward the side is provided in the heat damper 13 so that the plate-like portion 13f extends toward the upper passage R4 when in the blowing mode in which conditioned air flows to the upper passage R4. The plate-like portion 13f is disposed between the rotation shafts 13a and 13b of the heat damper 13 and the closing wall portion 13e. Thereby, the heat damper 13 can be reduced in size without deteriorating the air mixing property and without reducing the amount of blown air, and thus the high-performance vehicle air conditioner 1 can be made compact. .

  Further, since the rear portion of the plate-like portion 13f is accommodated in the hot air passage R2 when the heat damper 13 is in the rotational position for opening the upper passage R4, the amount of air blown from the defroster port 22 and the vent port 23 is sufficiently large. Can be ensured, and passenger comfort can be improved. In this case, the rotation angle of the heat damper 13 may be set so that the entire plate-like portion 13f is accommodated in the hot air passage R2, or the entire plate-like portion 13f is accommodated in the hot air passage R2. You may set the shape of the plate-shaped part 13f so that it may.

  Further, when the heat damper 13 is in the rotational position for opening the lower passage R5, an extension passage R6 extending the warm air passage R2 is formed, and the downstream side of the extension passage R6 is throttled. The airflow can be improved by increasing the flow velocity and causing the air to collide with cold air, thereby improving passenger comfort.

  Further, since the plate-like portion 13f is provided integrally with the heat damper 13, the plate-like portion 13f can be moved together only by rotating the heat damper 13.

  In addition, although the said embodiment demonstrated the case where this invention was applied to the semi-center type air conditioner arrange | positioned so that a ventilation unit may be located in a line with the left-right direction of the casing 15, it is not restricted to this, A ventilation fan and a heat exchanger The present invention can also be applied to a full-center type air conditioner arranged at the center in the vehicle width direction.

  Further, the plate-like portion 13f of the heat damper 13 may be integrally formed with the end wall portions 13c and 13d. Alternatively, the plate-like portion 13f may be formed separately from the end wall portions 13c and 13d. You may make it attach to 13d.

  Further, the upper passage R4 may be communicated only with the defroster port 22 or may be communicated only with the vent port 23.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the vehicle air conditioner according to the present invention can be mounted on, for example, an automobile.

1 Vehicle air conditioner 10 Evaporator (cooling heat exchanger)
11 Heater core (heat exchanger for heating)
12 Air mix damper 13 Heat damper (rotary damper)
14 Defroster damper 15 Casing 26 Lower holding portion 27 Upper holding portion 28 Partition wall R1 Cold air passage R2 Hot air passage R3 Air mix space R4 Upper passage (first passage)
R5 lower passage (second passage)
R6 extension passage

Claims (3)

A heat exchanger for cooling;
A heat exchanger for heating;
While containing the cooling heat exchanger and the heating heat exchanger, and comprising a casing formed with a defroster port, a vent port and a foot port,
Inside the casing, a cool air passage in which the cooling heat exchanger is disposed, a hot air passage in which the heating heat exchanger is disposed and the downstream side extends upward, the cold air passage, and the hot air passage An air mix space that introduces and mixes air blown from the air to generate conditioned air, a first passage that communicates with the air mix space and is connected to at least one of the defroster port and the vent port, and the air mix space communicating with the side closer to the warm air passage than communicating portion of said first passage extending downwardly in, defining a second passage connected to the foot opening, and the hot air passage and the second passage In this manner, a partition wall extending in the vertical direction and a holding portion for holding the heat exchanger for heating are provided in the vicinity of the downstream end of the hot air passage, and the upstream ends of the first passage and the second passage are aligned. Positioned on It is,
Between the upper end portion of the partition wall and the holding portion, the downstream end of the hot air passage is positioned,
The air mix space has a rotation shaft that rotates in the direction in which the upstream ends of the first passage and the second passage are aligned, and a closing wall portion that opens and closes the first passage and the second passage, A rotary damper that changes the amount of conditioned air flowing from the air mix space to the first passage and the second passage by the closing wall and switches the blowing mode is provided;
The rotary damper extends from the vicinity of the downstream end of the hot air passage toward the cold air introduction side of the air mix space when in a blowing mode in which conditioned air flows to the first passage and the second passage. Hot air that has flowed into the air mix space from the hot air passage is guided to the cold air introduction side of the air mix space, and on the other hand, when the blow mode is selected so that conditioned air flows into the first passage, the air flows toward the first passage. And a plate-like portion for guiding the conditioned air in the air mix space to the first passage is provided,
The plate-like portion is disposed between the rotary shaft and the closing wall portion when the rotary damper is viewed from the direction of the rotary shaft, and conditioned air is supplied to the first passage and the second passage. An extension passage that extends from the vicinity of the upper end portion of the partition wall toward the cold air introduction side and extends the hot air passage to the air mix space by the plate-like portion and the holding portion when the blowing mode is selected. On the other hand, the warm air flowing out from the downstream end opening of the warm air passage is made between the plate-like portion and the upper end portion of the partition wall when the blowout mode in which conditioned air flows to the first passage is set. It is formed so that it may flow through . In the vehicle air conditioner according to claim 1,
At least a part of the plate-like portion is accommodated in the warm air passage when the rotary damper is in a rotational position for opening the first passage. In the vehicle air conditioner according to claim 1,
Upper Symbol plate-like portion, when the rotary damper is in the rotational position of opening said second passage, an air conditioning system for vehicles, characterized in that positioned to squeeze the downstream side of the upper Kinobe length passages.

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